Another discovery which came via the outtakes concern 'Steel Wheels'. Like most Stones fans I didn't dig the cold digital feel of 'Steel Wheels'. But when I heard the Boot version of that album (there are two different ones) it reversed my stance. From that day on I never listened to the official version anymore, but only the much warmer outtake rendition. Plus - the outtakes include 'For Your Precious Love' from the Impression's catalog, a wonderful tune. A real head-scratcher why this one was left off. Agreed on 'Bigger Bang' being very weak. Sounds like Jagger demos. Which I think is exactly what they are.
Black & Blue' IMO is a very strong album. The album is better than the actual songs. Even though this was an open guitarist audition, disguised as an album it has a good, complete feel.
The one MAJOR issue I have with OP is ignoring the first 5-6 discs.I see that on other Stones boards too. The early albums are so important besides being IMO really tops. I listen to the first two albums all the time.